EP0653454B1 - Antikorrosionsfilm mit aufgearbeitetem Harz - Google Patents

Antikorrosionsfilm mit aufgearbeitetem Harz Download PDF

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Publication number
EP0653454B1
EP0653454B1 EP94304176A EP94304176A EP0653454B1 EP 0653454 B1 EP0653454 B1 EP 0653454B1 EP 94304176 A EP94304176 A EP 94304176A EP 94304176 A EP94304176 A EP 94304176A EP 0653454 B1 EP0653454 B1 EP 0653454B1
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EP
European Patent Office
Prior art keywords
film
resin
layer
corrosion inhibitor
component
Prior art date
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Expired - Lifetime
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EP94304176A
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English (en)
French (fr)
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EP0653454A1 (de
Inventor
Boris A. Miksic
Joseph M. Foley
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Cortec Corp
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Cortec Corp
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/02—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/70—Scrap or recycled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B32B2307/518—Oriented bi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/752—Corrosion inhibitor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/91—Product with molecular orientation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/1355—Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/1355—Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
    • Y10T428/1359—Three or more layers [continuous layer]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/259—Silicic material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers

Definitions

  • This invention relates in general to plastic film products, and in particular to a plastic film containing an anti-corrosion agent and wherein at least a portion of the film is formulated with recycled plastic.
  • Recycled resins represent an important and significant source for material useable in the production of plastic products.
  • ASTM standard D 5033-90 defines the various types of recycled plastics.
  • Non-limiting examples of such plastics are post consumer recycled plastics which are defined in the ASTM standard as "products generated by a business or consumer that have served their intended end uses, and that have been separated or diverted from solid waste for the purpose of collection, recycling, and disposition.” After use, discarded recyclable items are processed to yield a resin usually supplied in pellet form which can be used again in the formulation of another product. Such reuse is beneficial to the environment and acts to conserve natural resources.
  • Another object of the present invention is to provide a resin film formulated at least in part from a recycled plastic and containing an effective amount of a vapor phase anti-corrosion agent sufficient to overcome corrosive agents within the recycled plastic and to provide corrosion protection for items subsequently encased by the film.
  • Yet another object of the present invention is to provide a multi-layer laminate film wherein at least one of the layers is formulated at least in part from recycled plastic and wherein the film possesses vapor phase anti-corrosion properties.
  • the present invention is a resinous film at least partially formulated from a recycled resin and containing a vapor phase corrosion inhibitor.
  • Formulations of the corrosion inhibitor are compatible with the resins, preferably polyethylene or polypropylene, and are extruded therewith during manufacture of the film.
  • the claimed invention is elucidated in the claims.
  • One embodiment of this invention is a single layer film which is formulated from three components. The first component is a recycled resin, the second component is a fresh resin identical to the recycled resin, and the third component is a vapor phase anti-corrosion agent.
  • Preferable anti-corrosion agents are formulations of powdered anhydrous molybdates mixed with benzotriazole and sodium nitrite, or amine benzoates mixed with amine nitrates and benzotriazole.
  • the formulations are deposited on powder or granular silica gel particles. The film emits the anti-corrosion agent over a period of time to thereby protect items encased by the film.
  • Another embodiment is a double layer laminated resin film comprising a first layer formulated from a recycled resin and a second layer formulated from a fresh resin.
  • the second layer has incorporated therewith the anti-corrosion agent. Because the two layers of the double layer film are not permeable with respect to each other, corrosive-agent content of the recycled resin is not a concern so long as the second layer containing the fresh resin with the anti-corrosion composition surrounds an item to be protected, thereby positioning the first layer formulated with recycled resin externally.
  • a third embodiment is a triple layer laminate product wherein the layers comprise, in order, a first resin film layer formulated according to the single layer film defined above, a second metallic layer, and a third resin film layer formulated from a biaxially oriented polyethylene terephthalate.
  • This triple layer film provides tear-resistant properties because of the polyethylene terephthalate layer, and reduced or eliminated static build-up because of the metallic layer.
  • the films described above must contain a sufficient amount of the anti-corrosion composition both to overcome any corrosive properties inherent to the recycled product and to provide adequate emission therefrom to protect items which are encased by the film. In this manner, a twofold purpose is accomplished whereby recycled resin is employed while items subject to environmental corrosion are protected. Further, a method is provided of protecting an article from corrosive properties of a recycled resin contained in a film encasing the article, the method comprising incorporating in the film a vapor phase corrosion inhibitor.
  • an anti-corrosion composition is first formulated for subsequent incorporation into the film.
  • One preferred vapor phase corrosion inhibitor for extruded polyethylene film includes a mixture of either anhydrous sodium molybdate, anhydrous ammonium dimolybdate, or an amine molybdate, together with sodium nitrite and benzotriazole.
  • a mixture in powder form which comprises, by weight, about 70% anhydrous sodium molybdate, about 25% sodium nitrite, and about 5% benzotriazole. This mixture is particularly effective when extruded into polyethylene film at a rate of 2% by weight, and has been found to be effective at a rate of up to 3% by weight.
  • the useful range of the above listed components is, by weight, from about 65% to about 75% anhydrous sodium molybdate, from about 22% to about 28% sodium nitrite, and from about 4% to about 6% benzotriazole.
  • the powder mixture of Example IA is deposited upon granular silica gel, and is particularly effective when the powder has a particle size below about 1 micron.
  • the relative weight ratios are preferably about 45% vapor phase corrosion inhibitor component, and about 55% silica gel, although ratios of between about 30% and 50% vapor phase corrosion inhibitor component and between about 50% and 80% silica gel may be employed.
  • Amine molybdates according to the following structural formula are useful in connection with the present invention.
  • the synthesis of three amine molybdate compounds will be described below in Examples II, III and IV.
  • the aliphatic amines employed are from the group consisting of dicyclohexylamine, 2-ethylhexylamine, and cyclohexylamine, but it is to be understood that other aliphatic amines within this general category can be found useful as well.
  • a formulation is prepared with the following components, with percentages shown by weight: 10% dicyclohexylamine (molecular weight: 181.36; empirical formula C 12 H 23 N); 4% phosphoric acid; 36% water; and 50% aqueous solution of ammonium molybdate (20%).
  • the ammonium molybdate solution is prepared by adding pure molybdenum trioxide to a 5% aqueous solution of ammonium hydroxide.
  • the pH of the resulting solution is normally in the range of 7.5 to 8.5.
  • the dicyclohexylamine, phosphoric acid and water are mixed together to form a neutral to slightly alkaline solution, the pH being in the range of 7.5 to 8.5.
  • the aqueous solution of ammonium molybdate is then added.
  • the reaction that occurs is a simple displacement reaction in which a white powdery precipitate is formed upon addition of the ammonium molybdate solution.
  • the mixture is cooled to approximately 60°F, after which the precipitate is filtered, washed, and dried until the anhydrous form is obtained.
  • the anhydrous finished product is a fine white powder having the structural formula shown above wherein R 1 and R 2 are cyclohexyl radicals.
  • a formulation is prepared with the following components: 5% 2-ethylhexylamine (molecular weight: 129.2; empirical formula: C 8 H 19 N); 2.5% phosphoric acid; 67.5% water; and 25% aqueous solution of ammonium molybdate (20%).
  • the 20% ammonium molybdate solution is prepared as set forth in Example II.
  • the 2-ethylhexylamine, phosphoric acid and water are mixed together to form a neutral to slightly alkaline solution, the pH being in the range of 7.5 to 8.5.
  • the aqueous solution of ammonium molybdate is then added.
  • the reaction that occurs is a simple displacement reaction in which a white powdery precipitate is formed upon addition of the ammonium molybdate solution.
  • a formulation is prepared with the following components: 20% cyclohexylamine (molecular weight: 99.17; empirical formula: C 6 H 11 NH 2 ); 13% molybdenum trioxide (pure); and 67% water.
  • the water, molybdenum trioxide and cyclohexylamine are mixed together all at once. While mixing, the solution is heated to approximately 175°F. When the solution becomes clear, the mixture is cooled to 60-70°F, whereupon a gray-white precipitate forms. The precipitate is filtered, washed and dried until the anhydrous form is obtained.
  • the anhydrous finished product is a white crystallin powder according to the above structural formula wherein R 1 is a cyclohexyl radical and wherein R 2 is hydrogen.
  • Effective mixtures of the amine molybdates of Examples II, III or IV are normally formulated utilizing 70% by weight anhydrous amine molybdate of the type shown in Examples II, III and IV above, 25% sodium nitrite, and 5% benzotriazole.
  • the mixture is deposited on a powder or granular silica gel in a preferred weight ratio of about 45% corrosion inhibitor and about 55% silica gel. Ratios of about 30% to about 50% corrosion inhibitor and about 50% to about 70% silica gel are operable.
  • a second particularly useful vapor phase corrosion inhibitor component comprises a mixture of amine benzoates, amine nitrates and benzotriazole.
  • the following formulation provides a particularly preferred embodiment: Component Percent by Weight Cyclohexylamine benzoate about 68% Ethylamine benzoate about 10% Dicyclohexylamine nitrate about 20% Benzotriazole about 2%
  • This mixture also in powdered form and having a particle size below about 1 micron, is deposited upon granular silica gel, with relative weight ratios the same as recited above for the formulations containing molybdates.
  • the useful range of the preferred formulation shown above is as follows: Component Percent by Weight Cyclohexylamine benzoate about 50% - about 97% Ethylamine benzoate about 1% - about 20% Dicyclohexylamine nitrate about 1% - about 20% Benzotriazole about 1% - about 10%
  • compositions containing these components are prepared by simply blending the individual powdered components together.
  • the composite formulation is formed and rendered as uniform in particle size and configuration as possible.
  • This composite is then combined with a relatively limited quantity of polyethylene with the mixture then being passed through the barrel of a conventional extruder to form a master batch.
  • the resultant master batch is then chopped and rendered into pellet form.
  • These pellets are, in turn, combined with additional polyethylene and then extruded as the film containing a vapor phase corrosion inhibitor-desiccant of the type described.
  • a single layer polyethylene film having incorporated therein a vapor phase corrosion inhibitor is prepared by blending 75% by weight fresh polyethylene resin and 25% by weight post consumer recycled polyethylene resin, to which is added, in a quantity equal to 2% by weight of the resin mixture, a corrosion inhibitor agent of Example V.
  • the resulting composition is formed and rendered into pellet form as described above, and, in turn, the pellets are extruded as a film containing the vapor phase corrosion inhibitor of the type described.
  • a pigment addition to the formulation may be required or desirable to provide a color adjustment.
  • particular formulations and quantities of anti-corrosion agents can be adjusted as appropriate to meet specific requirements of an item to be protected, the environment of use, and the corrosive impurities present in the recycled resin.
  • a single layer polyethylene film having incorporated therein a vapor phase corrosion inhibitor is prepared by adding the corrosion inhibitor agent of Example V to a polyethylene resin which is 100% post consumer recycled resin.
  • the resulting composition is formed to a master batch which is rendered into pellet form and finally extruded as a film containing a vapor phase corrosion inhibitor and produced from 100% post consumer recycled polyethylene.
  • a double layer laminated polyethylene film having incorporated therein a vapor phase corrosion inhibitor is prepared by providing a master batch of post consumer recycled polyethylene resin and a master batch of fresh polyethylene resin.
  • the fresh polyethylene resin has incorporated therein an anti-corrosion agent as defined in Example V.
  • Each of the master batches of recycled resin and fresh resin is chopped and rendered into pellet form, and the two resins are thereafter coextruded to thereby produce the double layer laminated polyethylene film.
  • the film is positioned about an item to be protected so that the fresh-resin layer containing the anti-corrosion agent is surrounding the protected item while the layer constructed of the recycled resin is exteriorly disposed.
  • a triple layer laminated film having incorporated therein a vapor phase corrosion inhibitor is prepared by providing a plastic film such as biaxially oriented polyethylene terephthalate having a metallic layer deposited thereon.
  • a polyethylene film produced according to either of Examples VI(a) or VI(b) is then laminated to the metallic layer to form a triple layer composite film having anti-corrosion properties.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Laminated Bodies (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (17)

  1. Eine einschichtige Harzfolie, die aus einer ersten Harzkomponente, die ein Recycling-Harz umfaßt, einer zweiten Harzkomponente, die ein frisches Harz, das mit dem Recycling-Harz identisch ist, umfaßt, sowie einem Dampfphasen-Korrosionsinhibitor als dritte Komponente formuliert ist.
  2. Eine doppelschichtige laminierte Harzfolie, die eine erste Schicht, die aus einem Recycling-Harz formuliert ist, sowie eine zweite Schicht, die aus einem frischen Harz formuliert ist, umfaßt, wobei die zweite Schicht einen Gehalt eines Dampfphasen-Korrosionsinhibitors aufweist.
  3. Ein dreischichtiges Laminatprodukt, bei dem die Schichten der Reihe nach enthalten:
    (a) eine erste Schicht mit einer ersten Harzkomponente, die ein Recycling-Harz umfaßt, einer zweiten Harzkomponente, die ein frisches Harz umfaßt, das mit dem Recycling-Harz identisch ist, und einem Dampfphasen-Korrosionsinhibitor als dritte Komponente;
    (b) eine zweite metallische Schicht; und
    (c) eine dritte Harzfolienschicht, die aus einem biaxial orientierten Polyethylentherephthalat formuliert ist.
  4. Eine einschichtige Harzfolie, wie sie in Anspruch 1 oder 3 beansprucht wird, worin die erste Komponente von 25 bis 50 Gew.-% im Vergleich mit der zweiten Komponente ausmacht.
  5. Eine Folie, wie sie in irgendeinem der vorausgehenden Ansprüche beansprucht wird, worin der Korrosionsinhibitor eine Mischung umfaßt, die von 22 bis 27 Gew.-% Natriumnitrit, von 4 bis 6 Gew.-% Benzotriazol und von 65 bis 85 Gew.-% eines wasserfreien Molbydats umfaßt, das aus der Gruppe ausgewählt ist, die aus Natriummolybdat, Ammoniumdimolybdat, Amindimolybdaten und Mischungen davon besteht.
  6. Eine Folie nach Anspruch 5, bei der der Korrosionsinhibitor eine Mischung aus etwa 25 Gew.-% Natriumnitrit, etwa 5 Gew.-% Benzotriazol und etwa 75 Gew.-% wasserfreies Molybdat umfaßt.
  7. Folie nach Anspruch 6, bei der das wasserfreie Molybdat ein Aminmolybdat der Formel ist:
    Figure 00150001
    in der R1 aus der Gruppe ausgewählt ist, die aus einem 2-Ethylhexylrest und einem aliphatischen Kohlenwasserstoff mit bis zu 7 Kohlenstoffatome besteht, und in der R2 aus der Gruppe ausgewählt ist, die aus Wasserstoff, einem 2-Ethylhexylrest und einem aliphatischen Kohlenwasserstoff mit bis zu 7 Kohlenstoffatomen besteht.
  8. Eine Folie, wie sie in irgendeinem der Ansprüche 1 bis 4 beansprucht wird, bei der der Korrosionsinhibitor eine Mischung umfaßt aus von 50 bis 97 Gew.-% Cyclohexylaminbenzoat, von 1 bis 20 Gew.-% Ethylaminbenzoat, von 1 bis 20 Gew.-% Dicyclohexylaminnitrat und von 1 bis 10 Gew.-% Benzotriazol.
  9. Eine Folie nach Anspruch 8, in der der Korrosionsinhibitor eine Mischung umfaßt aus etwa 68 Gew.-% Cyclohexylaminbenzoat, etwa 10 Gew.-% Ethylaminbenzoat, etwa 20 Gew.-% Dicyclohexylaminnitrat und etwa 2 Gew.-% Benzotriazol.
  10. Eine Folie, wie sie in irgendeinem der vorausgehenden Ansprüche beansprucht wird, bei der der Korrosionsinhibitor auf Kieselsäure abgeschieden ist.
  11. Eine Folie, wie sie in irgendeinem der vorausgehenden Ansprüche beansprucht wird, bei der das Harz ausgewählt ist aus Polyethylen und Polypropylen.
  12. Eine Folie gemäß einem der vorhergehenden Ansprüche, welche einen Artikel umhüllt und den Gegenstand vor korrosiven Mitteln im Recycling-Harz schützt.
  13. Eine Folie nach Anspruch 12, wenn abhängig von Anspruch 2, wobei die zweite Schicht den Artikel umgibt und die erste Schicht außerhalb der zweiten Schicht liegt.
  14. Verfahren zum Schutz eines Artikels vor korrosiven Eigenschaften eines Recycling-Harzes, das in einer den Artikel umgebenden Folie enthalten ist, wobei das Verfahren das Vorsehen eines Dampfphasen-Korrosionsinhibitors in der Folie umfaßt.
  15. Verfahren nach Anspruch 14, wobei die Folie nach einem der Ansprüche 1 bis 11 beschaffen ist.
  16. Verwendung eines Dampfphasen-Korrosionsinhibitors bei der Herstellung einer Kunststofffolie, die sowohl aus frischem Harz als auch aus Recycling-Harz besteht, zum Überwinden von Korrosionseigenschaften, welche das Recycling-Harz aufweist.
  17. Verwendung nach Anspruch 16, wobei der Korrosionsinhibitor demjenigen entspricht, der in Anspruch 5, 6, 7, 8 oder 9 beansprucht ist.
EP94304176A 1993-11-09 1994-06-09 Antikorrosionsfilm mit aufgearbeitetem Harz Expired - Lifetime EP0653454B1 (de)

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JPH07186289A (ja) 1995-07-25
AU675317B2 (en) 1997-01-30
US5855975A (en) 1999-01-05
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